Personally I think $8000 for wheels and tires is insanely expensive. I've never heard of Vallano wheels, but for that price you're probably better off looking at Champion Motorsport wheels
\\\ Welcome to Champion Motorsport ///. The are the same, if not better quality than BBS's high end wheels and shouldn't be that much money. The Yokohama ES100's aren't very good tires. They are supposed really loud, don't grip that well and take long to heat up. Most of the brand name tire companies are overpriced and overrated. If you're looking for a summer tire in that size I would recommend the following:
Kumho Ecsta SPT: I have these on my car and they are incredible.
Falken FK-452: I've heard nothing but good comments about these
If you can go a centimetre wider then I would definitely recommend these:
BFG KDW2's in a 285/30/20